Hey, so I have this idea about an SCP who is a man cut in two halves. He was a patient suffering from seizures in one side of his brain in the early 1900s, so the doctors operated hemispherectomy (the removal of a hemisphere) on him. However, as they were removing the diseased half of his brain, his body started to split vertically. While he can't control his arms and legs due to losing the other hemisphere that controls them, his vital organs still function normally somehow, and so ishis brain.

I want to make him interesting by embedding some sort of secrets to him (I know I'm supposed to refer to a humanoid SCP as 'it', but I still want to fortify the concept first). For example, he turns out to be an immortal, so the foundation has to contain the two halves of his body separately, for fear that if he is fallen into the wrong hand, the secret to immortality might be achieved and abused. I also want to add conflicts to the SCP himself; for example, while the non-diseased part lacks emotions and thus has no motivation to 'fuse', the diseased part has become so desperate and volatile that it would attempt to disintegrate one half of any human being too close to it and fuse with the other half.

Still, I'm still new to this site and writing in general, so I have 3 questions:

Is this idea taken/too similar to another SCP?

Is this idea good enough?

What can I improve upon it? (especially the Foundation's reason to contain him; do they only do so to protect the public from being harmed, or do they want to safe-keep world-alternating discoveries?)

he turns out to be an immortal, so the foundation has to contain the two halves of his body separately, for fear that if he is fallen into the wrong hand, the secret to immortality might be achieved and abused

I'm not sure that the Foundation would come to this conclusion. Besides, knowing the secret to immortality doesn't necessarily mean the same thing as being able to replicate and maintain immortality. Plus the guy apparently had seizures and ended up cut in half, and most people would probably be okay living a more limited lifespan if it meant not having to deal with that stuff.

diseased part has become so desperate and volatile that it would attempt to disintegrate one half of any human being too close to it and fuse with the other half.

How does half a body disintegrate anything? Does this guy also have firepowers or something? Also, "really wants to destroy people for some reason" tends to be seen as a silly overdramatic backstory.

I don't think we have something similar to this yet, mainly because it feels like a mishmash of several different articles. You have right now a lot of concepts that don't seem thematically related (how is getting cut in half related to immortality?) and a lot of the guy's backstory seems kind of random.

I feel like right now, you need to figure out a more coherent conceptualization for why this guy is the way he is. "It just has all these random events because I want those things to happen" isn't a very sturdy story basis.

(especially the Foundation's reason to contain him; do they only do so to protect the public from being harmed, or do they want to safe-keep world-alternating discoveries?)

The Foundation contains all things that are anomalous, regardless of how harmful or harmless they are to the public.

Thanks for the criticism. In retrospect, it seems like a lot of my ideas are only there because of the 'coolness' factor - I thought they can make the story more unique. However, you're right about how loosely connected they are.

I'm not sure that the Foundation would come to this conclusion. Besides, knowing the secret to immortality doesn't necessarily mean the same thing as being able to replicate and maintain immortality.

When I started conceptualizing about the SCP, I envisioned him as a powerful being harboring the relics of immortality, but for some reason he suddenly falls into that disabled state. I thought that by imbuing the character with a mystery, that would make him valuable, thus worth being contained by the Foundation. Should I try to come up with why he has a seizure and separates to make the containment more valid (e.g. something that can even hurt immortals), or should i just abandon the idea?

Plus the guy apparently had seizures and ended up cut in half, and most people would probably be okay living a more limited lifespan if it meant not having to deal with that stuff.

In regards to why the SCP is in that state, it's just that I think it's interesting to create a character who used to be powerful but now in a desolate state (like Gwyn from Dark Souls). Also, unkillable characters with god-like power have been done before (like Able or SCP-343), so I want to make something different. However, you point out that it's not practical to utilize or take advantage of the character's power if he's that messed up, so maybe I should just drop that whole backstory of him being immortal?

How does half a body disintegrate anything? Does this guy also have firepowers or something? Also, "really wants to destroy people for some reason" tends to be seen as a silly overdramatic backstory.

That was both negligence and sloppy wording from my part. I forgot to add that the diseased half is the right brain, which is in charge of "prosodic language functions, such as intonation and accentuation" and results in "commissive response bias or error pattern" when damaged (according to this article). So the diseased part has the tendency to be sensitive to the tone of a human while not really understand what they mean, making it confused. That's why it wants to latch on to a nearby human being and disintegrate manipulate their flesh, destroy one half of them and fuse with the other half, becoming a half-conscious amalgamated blob of meat. I guess I fall into the "coolness" pitfall again - I thought flesh manipulation is the coolest shit ever.

As a courtesy to our readers on mobile devices, please collapse long posts. ~Zyn

Overall, I think I should stop seeing this character as something useful and mysterious and compelling to the Foundation and more as an anomaly in itself. I was encouraged by that one guide that said I should put best foot in, so I want to develop this idea. Though now I start to doubt it's within my caliber.

So the diseased part has the tendency to be sensitive to the tone of a human while not really understand what they mean, making it confused. That's why it wants to latch on to a nearby human being

I feel like this part may be workable, though I'm admittedly kind of getting Voldemort-on-the-back-of-Quirrel's-head from Harry Potter vibes.

Maybe this thing is effectively immortal, but the formula for immortality it discovered is fundamentally flawed? It sustains itself by slowly giving up pieces of its physical body, and is desperately trying to get all of its affairs in order before the immortality formula runs out completely. The Foundation gives it one D-class to fuse with so they can talk to it to try and figure out what happened to it, but this guy is only concerned with finding out where his wife was buried and what happened to his kids after the accident that left him with half a body. And then there's a reveal later on as the Foundation looks for information to use to bargain with the guy, and they discover he's actually an ancient lesser deity or something.

I dunno, most of the ways to approach this have probably been done similarly in existing popular media already. What will need to set this one apart is the story.

I feel like this part may be workable, though I'm admittedly kind of getting Voldemort-on-the-back-of-Quirrel's-head from Harry Potter vibes.

I thought that split-personality thing would look cool, but now I can't take it seriously anymore lol

Okay, so I think of 2 ways the story can go:

The immortal has an accident that damages half of his body and kills his family; even though he's still alive, he can't recall what happened. While he's being detained by the foundation who wants to know what happened, he unknowingly blurts out the clues leading to his godhood. Maybe I should convey him as an immortal who just wants a simple life but can't deal with the fact that he would outlast them?

The immortal is not the anomaly, but the victim. An ancient curse/artifact/cursed artifact (?) can debilitate immortals if they break some sort of contract. Maybe this guy belongs to a secret sect of immortals that has vowed to not mingle with human, but he gets tired of the deity lifestyle and builds a normal family, which is why he is punished?